A circular coil wire contains 1000 loops of wire. This coil has an area of 0.5 m2. A uniform magnetic field points perpendicular to the loop. The strength of the magnetic field is increased smoothly from 0 → 2 T in 4 seconds.  (a) What is the initial magnetic flux through the loop (when B = 0)?  (b) What is the final magnetic flux through the loop (when B = 2, 4 seconds later)? (c) What is the induced voltage in this coil?

Q: when it flies at 1000 km/hr horizontally so as

A:

Q: 14. A solenoid with 8000 turns produces a magnetic field of 0.4T in its center when a current of 12A…

A:

Q: Figure 2 shows a top view of a bar (the resistor of the bar R2 = 5.00 Q) , that can slide on two…

A:

Q: A prototype of an MRI consists of a set of 400 coils each having a radius of 0.30 m. To test its…

A: V=∆ϕ∆t=NBA∆t=NBπR2∆t=4001.2 T3.140.30 m23.6 s=37.7 V

Q: A variable magnetic field is perpendicular to a 195-turn coil of area 0.305 m?. The magnetic field…

A:

Q: A solenoid has 480 turns, a length of 12cm, and a radius of 5.0cm. The current in the solenoid…

A: Number of turns, length of the solenoid, radius of the solenoid, current, the solenoid acquired,…

Q: A wire loop of radius 17 cm and resistance 112 is located in a uniform magnetic field that changes…

A: Given: Radius of loop of wire, r=17 cm=0.17 m Resistance of the wire, R=11 Ω Solution: Consider the…

Q: A flat coil enclosing an area of 0.24 m2 is rotating at 55 rev/s, with its axis of rotation…

A:

Q: A train travels at 7.7 m/s due east. Calculate the induced emf between the ends of a horizontal axle…

A: Given  Train travel at 7.7 m/s due east.  V = 7.7 m/s  Axle is ,7.9 m long,  L = 7.9 m  Earth…

Q: A 5-turn square loop 10 cm along a side, resistance = 4.0 ohm is placed in a magnetic field that…

A: Given Number of turns N = 5 Area a                     = 10 cm = 0.1 m Resistance R           = 4…

Q: 10 turn conductive loop with an enclosed area of 0.45 m2 exists in the plane of the page. A magnetic…

A: From Faraday's law Induced EMF is equal to the rate of change of magnetic flux,        emf =…

Q: A square circuit with sides of length ℓ = 0.30 m and R = 10 ? moves with a constant velocity v = 3.0…

A: When a closed circuit brings in a magnetic field or is close to the magnet so that the magnetic…

Q: A 16-cm-diameter circular loop of wire is placed in a 0.50-T magnetic field. (a) When the plane of…

A: Given:radius of circular loop, r=d2 = 8 cmApplied magnetic field, B =0.50 TSolution:We know that the…

Q: How to determine the magnitude of the time changing magnetic flux thru the loop, if the EMF is…

A: It is given that

Q: A rectangular coil 0.055m by 0.085m is positioned so that its cross-sectional area is perpendicular…

A:

Q: circular loop of radius 5.1 cm is formed, placed with its plane perpendicular to a uniform magnetic…

A:

Q: A coil has an area of 100 cm2 with 226 turns connected across a 5.00 Q resistor to form a closed…

A:

Q: A circle wire loop with a radius of 1 m is in a 0.5 T magnetic field. Then over 0.2 seconds it is…

A:

Q: A coil of wire consists of 20 turns each of which has an area of 0.0015 m². A magnetic field is…

A: The magnetic effect on moving  charges,  currents, and magnetic materials is represented by a…

Q: The magnetic flux through a coil of wire changes from 9T m- to zero in a time of 0.50 s. What is the…

A: 18 V

Q: A variable magnetic field is perpendicular to a 142-turn coil of area 0.387 m². The magnetic field…

A:

Q: A long solenoid has 1,000 turns per meter and carries a current 1 = (100 A) (1-e-t/5.00 s). Inside…

A:

Q: A 15-turn circular loop of wire is placed into a magnetic field with initial magnitude 5 T. Over a…

A:

Q: Icoil formed by wrapping Go turns 4 wire in the Shape of a square is positioned in a magnetic field…

A: Given: The number of turns is 60.             The angle between normal to the plane of the coil and…

Q: A certain elastic conducting material is stretched into a circular loop of 5.7 cm radius. It is…

A:

Q: A magnetic field of magnitude 0.360 T is oriented perpendicular to the plane of a circular loop.…

A: Write the given values with the suitable variables. B=0.360 Tϕ=2.10 Wb Here, B is the magnetic field…

Q: A 1.0-m long straight wire is held in a horizontal east-west orientation and is then dropped.…

A:

Q: A conductive rectangular loop is being pulled at constant speed v out of a region of uniform…

A:

Q: A magnetic field of magnitude 0.390 T is oriented perpendicular to the plane of a circular loop.…

A: Given: Magnetic field B = 0.390 T Magnetic field is perpendicular to plane of circular loop Magnetic…

Q: The armature of a small generator consists of a flat, square coil with 120 turns and sides with a…

A:

Q: A conducting crossbar is in electrical contact with two vertical conducting wires and slides down…

A:

Q: A uniform magnetic field makes an angle of 30 degrees with the normal to the surface of a circular…

A: We will first write an expression for magnitude of emf induced in a loop. We then use the given…

Q: A magnetic field of magnitude 0.500 T is oriented perpendicular to the plane of a circular loop.…

A: Given  magnetic field (B)=0.500 T flux =2.55 Wb radius doubled. Required  radius flux

Q: the emf of a coil rotating in a magnetic field is zero at t = 0 and increases to its first peak at t…

A:

Q: The rectangular coils in a 355-turn generator are 13 cm by 19 cm.What is the maximum emf produced by…

A: Given: The number of turns is 355. The dimensions are 13 cm by 19 cm. The angular speed is 505 rpm.…

Q: A circular coil of wire is composed of 600 turns, has a diameter of 30 cm, and with a 25 mA current…

A:

Q: The component of the external magnetic field along the central axis of a 50 turn coil of radius 40.0…

A: Approach to solving the question: Detailed explanation:Examples: Key references:

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.